To the person who is caring for sick Puddy: you are to be congratulated, with a warm heart, for going to such lengths to care for your lovely friend. I tried to do that with my beloved Myrtille when she was sick, but she insisted that she wanted to go her own way - and she did - without treatment, which meant that she could not take fluids at all, but that was her choice, which we honored. We held her and loved her and helped her through all of her daily routines to the end, when she walked across to the other side of Being while in my husband's arms. So I know how complex it can be to try to give care to a little one, and I think you deserve nothing but praise for your efforts. No one is perfect, and a tiny bit of blood in the fluid is probably nothing to worry about - just, as others have suggested, you happened to hit a capillary or something. I used to use insulin, and occasionally that happens even with a sub-q injection of insulin. (We gave insulin to one of our cats, too - and she seemed to understand that it helped her, because we never had to call her when it was time - she just appeared in the kitchen. And it wasn't because we gave her a treat, either, because we didn't. I think she was just sensitive enough to know that her shots made her feel better.) I am rambling. Sorry. I just wanted to say I think you are doing a wonderful job.