an example of ageism

in 2015 when i was 14 and in my village Falakata and was in my Mithun mama's home. he has kept few puppies as pets. they were constantly barking but nobody was bothering and caring but when an adult dog entered his house it was also barking but then Mithun mama's mom told it to shut up and shooed it away with stone on her hand. this isnt fair right