Do school officials have the right to use drug-sniffing dogs?

I think that school officals do not have the right to use drug-sniffing dogs. One of the reasons I think tat this is wrong is because kids might get offended that thier own school owners do not trust that they are going to school just to learn. Also when the kids would like to go straight to class, the process of checking all the bags might be a long process that certain kids would not want to wait for. Anthor reason to not bring in the dogs is that kids might not respond to seeing animals next to their products and won't trust dogs at all. In conculsion the school officals should trust that kids are not bringing drugs onto thier campus.