Our At-Home Subcutaneous Fluids Kit for Cats (Everything We Use)

Disclaimer: This is what I personally use for my own cats, shared as a cat parent who gives subcutaneous fluids at home. It is not medical advice. Every cat is different, so please make any fluid, needle, or supply decision with your trusted vet.

Adonis started getting sub-Q fluids about a year ago.

I had heard about this butterfly syringe method briefly, but I was so overwhelmed by the idea of having to do fluids at all that I just went with the straightforward, basic way. Thinking this would be easier as I get started.

Bad choice.

It was hard at the start, so we told ourselves that, like any medical training, we just needed time.

Nope.

Six months in, we were still dreading the weekly fluids moment. It had become part of our routine, but the kind you brace for.

Then Anabelita's panel showed she needed fluids too...

And we knew: if Adonis was hard, Anabel would be ten times worse. She would chop our arms off, for sure.

So I finally looked into the syringe method. Adonis took to it instantly, no training needed. Obviously. He had already survived the hard way.

Anabel is still a work in progress. When she first needed fluids she was not in great shape, and she let me do it with, let's call it, manageable drama. Two sessions in she was feeling so much better, running around again, and now she absolutely will not let the fluids in. Ironically, lol.

Our vet gave us the green light on gabapentin so we could keep our arms. (That part was our vet's call. Make it yours with your own vet, not with a blog post.) We also worked out the timing: fluids at night, gabapentin two hours before, so she sleeps it off and does not lose a whole day to lazy mode. She wakes up back to her normal self.

💧 The SubQ Fluids Tool-kit: everything we use

This is our full at-home sub-Q fluids setup, in the order we actually reach for it. I keep the exact brands, sizes and reorder details in a private sheet for myself, so here I am just naming what each piece is and what it does.

Heads up: some of the links below are Amazon affiliate links. As an Amazon Associate I earn from qualifying purchases, at no extra cost to you. It never changes what I recommend, I only ever list what we actually use.

• The fluids (Ringer-Lactat). The electrolyte solution that goes under the skin. This is the standard Ringer-Lactat and what our vet has us on.
  
  
• Mini spike (B. Braun Mini-Spike Plus). A vented spike that screws into the fluid bottle so you can fill the syringe cleanly, with no needle and no stabbing the stopper over and over. It also helps you draw without air bubbles.
  
  
• Syringes (BD Plastipak, 50/60 ml, Luer-Lock). Draws up and holds the fluids. The Luer-Lock tip is the important part: the butterfly needle screws on and locks, so nothing pops off mid-session. Heads up: a lot of Luer-Lock syringe packs (the US one included) already come with their own tip caps, so check yours before you also grab the closing cones below.
  
  
• Caps (closing cones), only if you need them. If your syringes already come with their own caps, you can skip these. If they do not, they seal a filled syringe so you can warm it. My EU syringes are not capped, so I use separate ones (B. Braun Combi-Stopper), while the US Luer-Lock packs above often include caps already. (I am still checking whether pre-filling syringes ahead of time is a good idea, so that part is a question for your vet.)
  
  
• Butterfly needle, 23G (blue). The thinner, gentler needle. This is what we use for both Adonis and our queen Anabelita now. Fluids run a little slower through it, and that trade is worth it for us.
  
  
• Butterfly needle, 21G (green). A bit larger, so fluids run faster, but more cats feel it. We do not use this one right now. It lives in the kit as the faster option, for the braver cats that tolerate a bigger needle.

💉 Choosing your needle: 23G vs 21G

Butterfly needles come in gauges, and the number is a little counterintuitive: the higher the number, the thinner the needle. So a 23G is thinner than a 21G.

• 23G (blue): thinner and gentler. Less for your cat to feel, which can keep the whole session calmer. The fluids flow a little slower, so it takes a touch longer.
  
  
• 21G (green): larger and faster. The fluids move quicker, which some cats and larger volumes benefit from, but more cats notice the bigger needle.

We started Adonis on the 21G and Anabelita on the 23G. Over the past weeks Adonis (or Adonos, as he becomes when he is feeling spicy) made it very clear the 21G was not for him, so we moved him to the 23G too. It was easier on everyone, and now both cats are on the thinner one.

If your cat lets you choose, the gentlest needle they will tolerate is usually the kindest place to start. Your vet can tell you when a faster flow is a reason to size up.

🧪 A note on the fluids

Not all Ringer-Lactat is identical. Different versions carry slightly different amounts of electrolytes, and that can matter for your cat. A blood test can point to one formula fitting better than another.

The bottles we use are the standard Ringer-Lactat our vet put us on. If your vet suggests something specific, or your cat's bloodwork changes, that is a conversation to have with them, not a swap to make on your own. Every cat is different.

Price-check before you reorder.

The exact same item can cost more or less from one shop to the next. We have watched prices swing, so a quick search before you buy is worth it.

🛒 Buying from Germany or the EU

The Amazon links above are the easy option if you are in the US. If you are in Germany or the EU, here is where I actually get each piece:

• Fluids (Ringer-Lactat): shop-apotheke.com
  
  
• Mini spike: medplus24.de
  
  
• Syringes (BD Plastipak): praxispanda.de
  
  
• Caps (Combi-Stopper): praxispanda.de
  
  
• Butterfly needle 23G: praxispanda.de
  
  
• Butterfly needle 21G: praxispanda.de

🐾 Helpful Communities

Sub-Q fluids are commonly prescribed for cats with kidney disease and pancreatitis. If you are new to this, have your vet walk you through your first session (this post is our kit, not a how-to for your cat), and then lean on the people who live it every day. These two groups are full of them:

• Feline Chronic Kidney Disease (Facebook group)
  
• Cats with Pancreatitis (Facebook group)

Disclaimer: This reflects what I personally use and my own experience as a cat parent giving subcutaneous fluids at home. It is not medical advice. Any fluid, needle, or dosing decision for your cat should be made with your veterinarian.