From en.wiktionary.org:
** German
*** Etymology
The first sense derives from the second, because dogs of this breed were used as police dogs. From [de], called so because of their pointy tail.[1]
*** Pronunciation
- [de] - [de] - [de]
*** Noun
[m]
1. informant 2. [de] spitz [breed of guard dog] 3. * [de] 4. * [de] 5. * [de] 6. * [de]
**** Declension
[m]
**** Derived terms
- [de] , [de]
**** Descendants
- [bor=1] - [hu] - [pl] - [sh] - [sk] - [špícəlj] - [uk] , often also [uk]
*** References
References: [1]. [spitz]
*** Further reading
- [lang=de] - [R:de:DWDS] - [R:de:Duden]