Losing weight Lab

[finddee]

Hi.. we have a choclate lab she is 10 years old..
been very active until this winter.. we have been hit by
snow and cold for 8 weeks straight. She does have arthritis
but she has not been eatting well and she has lost alot of
weight . We tried worming her couple days ago to see if that
was something unknown.. we are now feeding her canned food
she is eatting some better but we are concerned about
our loved family pet. She still has some energy but we are
unsure..
Does this sound like something bad?