Yes worms can cause bleeding, and thus anemia, but mites are very dangerous and can kill. Valbazen is only for worms, and if you find evidence of mites (or lice,) permethrin 10 mixed with the appropriate amount of water according to directions isused every 7 days to treat mites. If they are gone after the second treatment, you can stop. Permethrin garden dust is also okay to use in cold weather. But all bedding needs to be cleaned out and burned or carried far away, and nest boxes, coop, and roosts should be treated. Here is a link for the Valbazen:
https://www.valleyvet.com/ct_detail...MI1qOvj4m87AIV0sDACh0UAQVqEAAYASAAEgLmNPD_BwE
Martins or Gordons permethrin 10 are available at Tractor Supply for under $10 dollars for 8 ounces to mix with water.
https://cdn.doyourownpestcontrol.co...3525d08d6e5fb8d27136e95/p/e/permethrin-10.png
https://www.valleyvet.com/ct_detail...MI1qOvj4m87AIV0sDACh0UAQVqEAAYASAAEgLmNPD_BwE
Martins or Gordons permethrin 10 are available at Tractor Supply for under $10 dollars for 8 ounces to mix with water.
https://cdn.doyourownpestcontrol.co...3525d08d6e5fb8d27136e95/p/e/permethrin-10.png