Trying to gauge how normal our dog's reaction is to visitors.
Female, spayed, 1yo. Rescue from abroad, we got her just as the major lockdown hit in December/January so we were only able to properly socialise her in the house from April/May, plus not regularly due to lack of family and friends in the area. She barks every time people come to visit, for a long time, and only calms down once she's went on a walk with them.
She also barks on behalf of her sister who is a more recent (and very scared) rescue dog, as she's protective of her. We're trying to work out how much of her behaviour is normal, and if socialisation classes would help as this doesn't happen outwith the home - just in the house or garden.
Thanks in advance!