This is the 8019th most frequent German word.
hundehalterin
A female dog owner.
In this sentence, 'Hundehalterin' refers to a woman who owns and takes care of dogs, used in the nominative case as the subject of the sentence.
Die Hundehalterin füttert ihre Hunde jeden Morgen.
The dog owner (female) feeds her dogs every morning.
Here, 'Hundehalterin' is in the dative case, as it refers to the indirect object of the verb 'helfen' (to help).
Ich habe der Hundehalterin geholfen, ihren Hund wiederzufinden.
I helped the dog owner (female) to find her dog again.
In this sentence, 'Hundehalterin' is in the genitive case, showing possession of 'Tiere' (animals).