i have a milk snake my problem is that he opens his mouth once in a while and he caughs like when whe have flem in our lungs he is active and wants to eat. he is a little bloated where his lungs are.I hade two kings snake that had simelar symtopms thay are dead was told that they had some king of bacteria infection from bad food theyu also had blood come out of there mouth where there tounge comes out the vet did not know what they were doing this snake is in the early stages of this what should i do he is 10 yrs old