[@Expendable]basing on quick google search, snakes seems to have large venom gland and can bite multiple times before being dry. So I will just go that SKA can bite with venom multiple times. 

To answer the latter, the adult can dents and maybe able to be strong enough to bludgeoning an armored knight using its weight. But SKA isn’t so I’ll just answer with a no for now (he is one day old).

If it is any easier for you, I can just write that a Biped-Serpentine can bite through thin armor. Idk, you are the one that gets to define what should a one star monster get to have.