It's well known (and scientifically proven) that interaction with a gentle, friendly pet has significant benefits. Here are some of the most common.

Physical Health

Lowers blood pressure

Improves cardiovascular health

Releases endorphins that have a calming effect

Diminishes overall physical pain

Mental Health

Lifts spirits and decreases depression

Decreases feelings of isolation and alienation

Encourages communication

Provides comfort

Increases socialization and sense of community

Reduces boredom

Decreases anxiety

Helps children overcome speech and emotional disorders

Creates motivation for the patient to recover faster

Reduces loneliness 

Literacy Support (PAWS for Reading)

Helps children focus better

Improves literacy skills

Provides non-stressful, non-judgmental environment

Increases self-confidence

Reduces self-consciousness

Encourages the love of reading in specific and learning in general

Physical Therapy

Increases joint movement

Improves recovery time

Maintains or increases motor skills

Provides motivation to move more, stretch farther, exercise longer