help i have a 6 month kitten and he has been lethargic for 2 days he has eaten a little bit but mostly he has been sleeping i took him to the vet and they checked him out but because i did not have more than 100.00 on me the did not run any tests thay gave me an antibiotic and sent him home any body have any idea on what might be going on with him (he has not been vomiting or has had diarehha