Recently my dog remy, a 2-yr old chihuahua stopped pooping for her daily walk. then i discovered that the left side of her butt is swelling and all red. i took her to the vet and they gave her pills, she never ate them even i put them in water. she haven't eaten for 3 days and im super worried about her, now all she does all day is lying on the wood floor or her mat. and then i found out that the part under her tail, where she urinates and do her bussiness, is red and swelling and suppurate as well. i tried putting ice on it and she whimpers with pain. also, i remembered that she always wipes her butt on the carpet, i thought it was normal for dogs to do that. could that be related to her issue now? WOULD SOMEONE PLEASE PLEASE PLEASE tell me a way to help her and help me with whatever information that relates to this. THANK YOU SO MUCH!!!