Dog's neck has a fluid lump after scruff injection. Is it normal?

No need to worry right now. The fluid can sometimes be taken down to this location by gravity and may take time for it to be absorbed into her system. If she becomes uncomfortable where the fluid is then I would let your veterinarian take a look at her. Thank you for using Petco Pet Education Center, formerly Petcoach.

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question about George. It is normal to have a lump of fluid develop where the subcutaneous fluids were given. This pocket of fluid will be absorbed over the next couple of hours. As long as you used a new needle to give the fluids, it is not likely you introduced an infection; even if you did, it would show up immediately. The lump will be due to the fluids, and again it is normal. It may feel a big uncomfortable to him for now, and I'd leave him be and let him hide. It should resolve in a few hours. I hope this helps.

Sometimes the skin and the subcutaneous space where the fluid was put can get sore, especially if there was a lot of fluid pressure. This should go away after a day or two. Next time Jack needs subcutaneous fluids ask the vet to divide the fluid up into two separate places, it might help keep it from being sore afterwards.

Many injections can cause temporary lumps which are generally painless and resolve over 4-6weeks. If there is any discomfort or heat in the area or it does not reduce over time you should have it checked by your vet to rule out more sinister causes

FNAs involve inserting a needle do they can be somewhat traumatic. I imagine it has upset the lump and caused some inflammation. With inflammation there can be fluid build up which is likely what you are seeing in the neck. If he is in pain or the swelling gets worse have the vet check him over.

This is not unusual. Your dog had an edema, which is a collection of fluid in the tissue. Gravity makes the fluid "drop" towards the ground, so it moved to the neck. This is not anything to worry about. It will take a few days to be reabsorbed by the body. If the swelling gets very warm or painful, take MJ back to the vet. If it stays "cool" (the same temperature as the skin around it) and the skin does not turn red and is not painful, you can just wait it out.

If he received injections at that time, this may be a reaction to the site of the injection, most of which resolve after approximately 6weeks. If there is any pain or heat in the area or if it continues to increase in size you should have it assessed by your vet to rule out growths or abscesses/infection