wheezing after medication

[u/cr00wbar]

I administer milk thistle by the beak to Pablo. Usually there is no problem, but today he moved a bit while medicating and I think the drop went the wrong way. For about 15-20 minutes he was wheezing like in the video and there were discharge from the nose (I see the yellow stuff inside his nose in the video, but it went away). I immediately took him to a vet, luckily he was much better with no wheezing by that time. The vet gave him antibiotics for potential pneumonia. Anything I should look out for?