Mon chien est grand.Mon chat est gros et orange.Mes animaux mangent trois fois par jour.Nous marchons aux magasins.
The important thing with this exercise is making sure everything agrees with the noun. For example, chien and chat are both masculine, so 'grande' or 'grosse' would not fit.It is also important to know how to conjugate 'manger' and 'marcher' appropriately into the present tense.
To make this more challenging, the tense could be changed i.e. we walked to the shops/we will walk to the shops.