SFTo NY? Dunno.
Chihuahuas seek warmth first, ... Then food.
If you place a heating pad on the floor and turn it on, it is very popular.
I rescued a female Chorkie last year..never heard of a Chorkie until then...she’s a blast...in 60 years..I never had a dog smaller than a Dobie...so it’s a big change..but she is perfect for an apartment...I named her Reagan...