How the tick got into my apartment?

I live on 8th floor apartment house and i have 9 month old dog. This morning i found blood splash on floor from the tick. I found tick on my floor half alive. I always brush my dog and check up before going inside house . And my dog has the colar thing that shields against the tick and flees .... so i wonder where... show more I live on 8th floor apartment house and i have 9 month old dog. This morning i found blood splash on floor from the tick. I found tick on my floor half alive. I always brush my dog and check up before going inside house . And my dog has the colar thing that shields against the tick and flees .... so i wonder where that came from ???? I always vacum and keep house clean.
13 answers 13