leg mites question

[IdahoPrepper]

Can a bird be free of SLM and still have bulging scales? We have treated and treated these birds for 6 months with everything under the sun. They are better but I am wondering if the sales are raised do to remnants of the mites and not "live" mites.

 

[MrsBachbach]

Can a bird be free of SLM and still have bulging scales? We have treated and treated these birds for 6 months with everything under the sun. They are better but I am wondering if the sales are raised do to remnants of the mites and not "live" mites.

Pics would help and how old are the birds?