Which of the following animals are commonly attacked by stick tight fleas?

Stick tight fleas are particularly known for their preference for nesting in the feathers of birds, which makes chickens a primary host. Additionally, these fleas can infest other small animals such as cats and ground squirrels. This combination allows for a more favorable environment for stick tight fleas to thrive and reproduce.

The presence of chickens in the correct choice is especially relevant. Chickens not only are a primary target for these fleas but also are often found in environments where fleas can easily transport to them. The other animals listed, while they may be affected by fleas in general, do not align with the specific preference of stick tight fleas which habitually attach themselves to the skin and feathers of birds and occasionally mammals. Thus, the choice accurately captures animals that are commonly attacked by stick tight fleas.