Discoloration Of Lips In Dogs I Changed My Dogs Food Yesterday And Today His Lips Are Swollen?

I changed my dogs food yesterday and today his lips are swollen? - discoloration of lips in dogs

Her upper lip, without) look good rubber (, no fading at all, do not panic, and had to touch or pressure on them. He acted completely normal and has not even noticed.

Will it be good if you change his food again?