email. Could you make it sound more British and more correct?

Dear Pat,

How are you ?  It's Jose.

This is my email, 

I just wanted to reassure you about yours dogs life now.

BP and Jemmy are really fine. Jemmy loves sleeping and going for a walking around in the garden.He eats very weel, He has good appetite and eats very well. He looks extremely happy.

BP prefers to be stay in the garden playing round with her new friends. She is a little bit slow when she is eating. - understandable  I understand that is because of her teeth problems , but that´s all. He gives and gives kisses all the time.

They both love those special biscuits you left for them.
Honestly, they seem to be having a holiday in the countryside.

Please feel free to use contact me whenever you need.

Best regards

Jose