Mr Fothergill has a nasty case of dry rot, so Bob and crew will have to use some smelly chemicals to fix it. As these will affect Mr Fothergill's allergies, he goes to his sister's for the day. But she doesn't get on with Hamish, his pet parrot, so Molly volunteers to look after the bird. But Hamish's constant mimicking starts to cause problems with JJ's stocktaking, so he puts the parrot in his office for safekeeping. But Hamish escapes and flies into the yard, where Trix is stacking up a tall pile of pallets. The results are none too stable and it is only thanks to Hamish's warning that she avoids the toppling pallets. JJ takes a shine to Hamish and when Bobs work is completed, he's sorry to see him go. Mr Fothergill returns home, his allergy seemingly cured. But as soon as he sees Hamish, he starts to sneeze again. Wendy realizes that Hamish must be the cause of his allergy, so the bird will have to find a new home. Molly suggests JJ's yard, and everyone is happy to agree!