Hello there. My name isXXXXX and I am sorry to hear about your kitties. This sounds like a complicated situation but you kind have given all the clues that tells what most likely is going on in your house. Since Beau was sick with a respiratory infection when he was at the shelter as a baby then most likely he has the herpes virus. This virus is one of the number 1 causes of upper respiratory infections in cats. It is also one of the most contagious. Once they get infected they never get rid of the virus. The virus just goes dormant in their body and stays there possibly forever or can come out in flare ups usually set off by stressful situations or other illnesses that wakes up the virus from dormancy. So it sounds like something around the 4th of july caused him to have a flare up of the herpes virus which can have all the clinical signs he was showing, lethargy, sneezing, watery eyes, or some of these or none of these. Then it sounds like he has passed it one to the older cat who is now infected also with the herpes virus. At this point and time there is no reason to keep them separate since they are already infected and exposed. If there are any other cats in the house i would keep them away at this point and time. Beau already has it and will not get rid of it but the goal would be to help his body fight it off and put it back into dormancy. There is no vaccine at this time against this virus and again is very common. The thing you can do is treat with Lysine. Which is an amino acid that will slow down virus replication and help the immune system get it under control. You can keep them on this amino acid forever but usually just recommended when they are having a flare up. Also have them checked to make sure there are no secondary bacterial infections in their nasal passages or eyes indicated by lots of green goopy discharge. If this is present they should also be treated with antibiotics. I hope this makes sense but your situation sounds like a text book example of the herpes virus reeking havoc in a household.
Please let me know if you have any further questions or concerns. I would be happy to help. Please do not forget to rate my response so I receive credit. Thank you
No, I have no other cats but Bella is so much sicker than Beau was, I'm really worried about her. What you are saying makes perfect sense and I am relieved that most likely this is not something that will be passed back and forth. In reading the medical records that came from the shelter for Beau, he was a very sick little baby. Luckily, he was in a no kill shelter and they sent him to the emergency vet where he spent a couple of days. He was dehydrated and had bacterial infections in his nose and eyes and was having difficulty breathing.
What dosage of Lysine should I give them? I have heard about that and the herpes virus.
I think we are on the road to recovery. Both cats are much improved (said with fingers crossed). Put both cats on L-Lysine, my vet agreed it was most likely a recurrence of the herpes virus for Beau and he infected Bella.