I have a 5yr old sheltie/ maltese cross who's coat looks very much   
like a sheltie's however it never seems to shed but just grows   
thicker until I give in and have her shaved. 
I have been told she has a triple coat. I am after advice on the best   
way to manage her coat as she seems to always be hot and doesnt seem   
to enjoy her walks when her coat is so thick, she seems to be constantly panting 
Am i best keeping her shaved and buying a coat for winter? It seems a   
shame as her coat is so soft and luxurious!