You and Mr. D are having issues. I hope you shake that cough!! Did you ask about Ventolin? Msybe you have a tad of asthma. this opens your bronchi.

Regarding Mr. D, maybe look between the pads of his paw. This happens to Grampie sometimes actually he’s limping now. If you kinda look around or feel deep next to or between the pads,
There may be a sore. I just found a little sore on Grampie.
I put just a little Vaseline on the sore to heal and smooth it.
Or you can use neosporin, but I worry if they lick it.

I hope you both feel better soon.