My 7 year old dog has never shown aggression to anyone before and up until now has been great with my 16 month old son. Yesterday he approached her while she was eating and she bit him in the face. I feel I can’t trust her anymore and should find her a new home. Am I overreacting?

I've had my 7 year old pitt mix since she was 4 weeks old. I took her through obedience classes and she follows commands nicely unless she is excited about visitors.

She's never been aggressive towards anyone. The only aggression I've seen is towards other dogs who approach us while walking and towards a friends toy poodle who constantly harassed her.

Up until now she's been great with my son who is 16 months. He loves petting and hugging her and I truly thought she liked it as she's always craved any attention.

Yesterday my son approached her while she was eating (my fault- I was 2 feet away). She's never been food aggressive at all but bit my son in the face. We were very lucky that it wasn't more serious. I feel deep down that I need to find her a new home. I feel guilty crating her all day but I don't trust her anymore. I'm scared that since she's done it once now she will think she can bite him again.

Do you think I'm overreacting?