WHats wrong????

[Bruceweb]

i have been owning ball pythons for quite some time... about 4 or 5 months ago, all THREE of my snakes went off feed. i dont over hold them, and they all have heat pads. and they have ALL become very lathargic and slow, when i hold them, instead of slithering, they sit. (they used to be very active), and rarely flick their toungs... Whats wrong????

Some of mine do this occasionaly..they usually just start again as if nothings wrong..could be the temps