[joy and bella]

i bought bella the alex dog carrier. i was told it was very safe but the vet told me not to leave her in there longer than an hour. the thing is bella is with me all the time. i hardly ever leave her home. i always have food and water with me to give her, and always take her to the bathroom, but sometimes i have her in there for a while. she gets break like when we are in the car and stuff. is this ok, or am i being horrible?????????