[Wylie's Mom]

I feel for you, this is a tough one in terms of what to do next.

First, a mild enlargement could mean nothing. For some reason, many yorkies do have larger hearts in general...we've seen that here a lot. But anytime 'enlargement' is mentioned, the concern is that this could mean present or future CHF (congestive heart failure) - which can cause coughing in later stages. If CHF may be developing, then the vet may want him on Enalapril for the rest of his life.

With the pneumonia - is it bacterial or viral pneumonia...? If it's bacterial, why aren't they using a more aggressive antibiotic before doing anything invasive? Also, I'd definitely be asking for a cough suppressant so your kiddo can get enough rest and for decreasing that coughing. If your "new med" includes a more aggressive antibiotic, then you want to give it for the entire time recommended to avoid creating resistance.

Since he's been coughing for so long, you many want to explore allergies. Does he chew/lick his paws at all...?

Keep us posted...hoping he'll improve soon!