We realise it’s a beauty salon for the canine variety but that’s still not what a dog says auf Deutsch—der Hund
bellt oder macht
wau wau, onomatopoetically.

Incidentally, most German animals have different though outstanding accurate cries: the goat goes
meck meck (like a
cat lapping up something), the dove
ruckediku-ruckeddiku, and the duck goes
nag nag. The last call is apparently more prominent in former East Germany as opposed to ducks going
quak in the West—maybe due to a television programme, but nothing on whether dogs (this shop being just over the border) spoke differently.