Buster has been having some issues since 3/31. It all started with a day of vomiting, approximately 5 times in all last Wednesday. On the last vomit at around 5pm I found a bit of cotton in the vomit. I took him to University of FL Small Animal Hospital ER. They did xrays and did not feel he had a blockage in his GI tract. They could see something in the tract but didnt feel it was blocked. They gave him fluids and anti nausea shot and sent him home later that evening with instructions for me to f/u with my vet next day to do more xrays to be sure what was in his system was moving. I went to my vet next day for the xrays. She said that there was good movement and also felt no blockage. He was not himself and would lay around mostly and sleep, not playing with his sister. Also didn't want to eat. Vet gave him more fluids and sent me home with some Cerenia pills for nausea, recovery food and said to try boiled chicken, rice, bland things like that. That evening he ate the small can of recovery food. I went back to vet without him on Friday to buy more cans of the recovery food and more Cerenia. He showed very little interest in food over the weekend including the food i bought, chicken and rice. Finally ate a boiled egg on Sunday. He has had low energy since then. I called vet back on Monday, she wasn't able to get me back in until Wednesday. She didnt feel he needed xrays again, did an physical exam and felt he was not experiencing a blockage. She gave him fluids again and sent me home with more Cerenia, added Omeprazole and also Proviable probiotics. By Thursday with little eating Loose stool and low energy we decided to got back to UF ER for possible ultrasound to be sure about the blockage. UF admitted him on Thursday and did xrays again and felt there was a blockage. Prepared me for surgery and I paid the 75% deposit for that and next step was an ultrasound. After the ultrasound they called back and said he is not blocked. They kept him overnight, gave him fluids all night etc and kept him most of Friday as well. Said I can pick him up and sent him home with Low Fat dog food that he ate for them. Said that he seemed to be having better energy. Friday at home still wouldn't eat for me and was sleeping a lot but did play a little bit and went on a walk. On Saturday he wasn't eating so when UF called to f/u they seemed surprised and said to try other things like boiled chicken, the meat baby food and even try a treat to see if any interest. He ate 2 jars of baby food chicken. Sunday was more playful and ate in morning and evening, baby food and wanted a treat. I was very happy. This morning though seems low energy again and no interest in food. I'm really not sure what to do. Has anyone every experienced anything like this? I suppose I will take him back to UF ER again but feel frustrated. I took away all their toys after the stuffing, they seem to try to eat everything so i thought that best. Could he be depressed? Is that crazy. Miss my crazy little bouncy Buster Brown!