Blood blisters on swollen rotweiler legs

My 8 yr old rotweiler back leg is swollen with blood blisters now travelled into other bk leg! Vet has him on antibotics for 2 weeks now and not getting better only worse! Anyone out there can help! I can attach picture of anyone knows how

Mapping: DefaultPageMap
Map Field: TopLeft
Ad Slot: PW1_RON_Top_Left
Size Mappings: Desktop Only
Mapping: DefaultPageMap
Map Field: TopRight
Ad Slot: PW1_RON_Top_Right
Size Mappings: Top_Right
Submit your own photos!
Dog Breeds Selector

Find your perfect match based on activity level, size, intelligence and more!

Mapping: DefaultPageMap
Map Field: BottomRight
Ad Slot: PW1_RON_Btm_Right
Size Mappings: Btm_Right