Severe breathing issues, eye injuries, and spinal issues plague pugs due to their extreme breeding. Daily medication is often needed.
Bulldogs struggle with overheating, skin fold infections, breathing difficulties, and birthing problems requiring expensive medical intervention.
Aggression and neurotic temperaments are common chihuahua traits. Their tiny size also causes fragility around children.
Chow chows are highly aggressive if not extensively trained and socialized. Biting incidents are frequently reported.
The shar-pei's wrinkles constantly cause skin infection and irritation. Their temperament can also be standoffish.
Basset hounds are prone to back injuries, glaucoma, obesity and tumors. Their droopy eyes also accumulate debris.