Non mittendus cánibus! Unless you're in Switzerland.

From the Sequence for Corpus Christi written by St. Thomas Aquinas.

Ecce panis Angelórum, Factus cibus viatórum: Vere panis fíliórum, Non mitténdus cánibus.

Behold the Bread of Angels,  For us pilgrims food, and token Of the promise by Christ spoken, Children's meat, to dogs denied.

Unless you live in Dioces of Chur, the oldest diocese in Switzerland, having been erected in the 5th. century.

Bishop Bonnemain: No Excommunication For People Who Shared Eucharist With Dogs

 

Clarification result of the incident in the parish of Guthirt - Diocese of Chur