Mayh

[spiral ice]

Salut @quick path here are some corrections for your sentences:

Je suppose il ç'est que c'est un chien Dollarmation race de race dalmatienne/un chien dalmatien
Je suppose qu'il est masculin? que c'est un mâle ?
Il semblant semble très calme et cool
Je l'appelle "petite baguette"
Il serait votre bien companion bon compagnon/un bon compagnon pour vous
This was pretty good! Keep it up and don't hesitate to give it another go with other characters

Were you describing this little guy ?

[quick path]

Oui ! C'est exact ! C'était ce petit camarade !

Thanks a lot for taking out some of your time to help me out, I will try my best (I don't know yet how to say this paragraph in french).

[spiral ice]

pas de souci (no worries) et bon courage !

by the way @quick path, you might have missed @worthy pulsar's guess:
#🌞défi-dictée-estival message