Maybe has something stuck in his throat. Did he eat anything unusual today. Pups can find all sorts of things to chew on. See if u can reach down his throat and feel anything. If u can but cant grab it out id take hm to the vet. Hope he feels better.
Dexter Bartolomeu -GSD (20 months)
Fluffy Cornelius - Maltipoo rescue (approx 6 yrs)
Squeezette Antoinette- Shih Tzu (15 yrs)