die Hündin
female dog
A female dog.
Unsere Hündin hat letzte Nacht fünf gesunde Welpen zur Welt gebracht.
Our female dog gave birth to five healthy puppies last night.

female dog
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female dog
A female dog.
Unsere Hündin hat letzte Nacht fünf gesunde Welpen zur Welt gebracht.
Our female dog gave birth to five healthy puppies last night.

The word 'Hündin' (female dog) is the feminine form of 'der Hund' (the dog). The ending '-in' is frequently used in German to form the feminine form of words for people or animals.
Unsere Nachbarn haben einen Hund und eine Hündin.
Our neighbors have a male dog and a female dog.
In connection with offspring, 'Hündin' (female dog) is often used with verbs such as 'Welpen bekommen' (to have puppies) or 'Welpen werfen' (to whelp), as well as the adjective 'trächtig' (pregnant).
Die Hündin ist trächtig und wird bald ihre Welpen bekommen.
The female dog is pregnant and will have her puppies soon.
As with other pets, 'Hündin' (female dog) is often used in everyday contexts, for example in the expression 'mit der Hündin Gassi gehen' (to walk the female dog).
Ich muss später noch mit der Hündin Gassi gehen.
I still have to walk the female dog later.
dog
'Hund' and 'Hündin' both refer to the same pet, but with different levels of precision. 'Hund' is the general word and can mean a male or female animal. 'Hündin' explicitly says that the dog is female. In everyday life, 'Hund' is often enough when the sex is not important. 'Hündin' fits when you are talking about breeding, the vet, behavior, or the exact difference between male and female. The words can be confused because 'Hund' is sometimes also used as a general umbrella term.

Am Morgen bringt Herr Kaya seine Hündin zur Tierärztin.
In the morning, Mr. Kaya takes his female dog to the vet.
Für die Reise sucht Frau Müller einen Platz für ihren Hund im Zug.
For the trip, Ms. Müller is looking for a place for her dog on the train.