There are many reasons for this. The dog may have some thing stuck in its throat. It may have a stomach ache. When dogs get a tummy ache they will eat grass to make them vomit to try and get rid of what is hurting their stomach.
The only episode that features Steve eating hot dogs is Season Four|Episode Eighteen Weiner of Our Discontent but I don't recall Steve saying anything about a gag reflex, Roger perhaps but not Steve.
Panda bares are not born with a gag reflex. It takes up to 8 months for the muscles to strengthen enough to form a gag reflex. This heps the young Panda Bares get nutrients that they much need.
gag
It stands for "Gag Box"
The term gag factor refers to the gag reflexes. For example, a baby has very sensitive gag reflexes so even small amounts of food may cause the baby to gag.
Gag
probably Over The Nose gag..
Sharks have no gag reflex.
It is poo
You die
First a tight cleave gag, two a handkerchief in front of the first gag, three some tape and four an over the mouth gag. Nice and quiet.
There are some dangers when using a ball gag. Ball gags can be pretty rough on the jaw. Two major concerns when purchasing a ball gag are the material of the ball gag and the size of the ball gag.