Well, hmmmmm. Have you studied the conjugation of verbs? And the agreement of adjectives with their nouns or pronouns?
Illa eripio animalia. = I tear away those animals.
Vikki amat eripui animalia. = Vikki loves I have torn away animals.
Sed ibi est una difficultatis. = But also there is one of difficulty there.
Aliqui animalia es periculosi. = Some animals you are dangerous (but the -i ending doesn't match the neuter needed to modify "animalia" nor the singular of the subject in "you are." Basically, this makes no sense at all.
Cur es animalia periculosi? = Why is animals dangerous? But again "periculosi" doesn't agree with "animalia."
Quia animalia est formido.= Because animals is fear. The word "formido" is a noun meaning "fear."
Vikki amat felicio animali = Vikki loves ____ ____ -- hard to deal with what you've written; "animali" means an animal, but it's in dative or ablative case, which makes no sense here; "felicio" is also in dative or ablative, but since the noun it modifies makes no sense in the sentence, it doesn't mean what you think it does!
Go back over noun declensions (especially 1st, 2nd, and 3rd declensions), the need for adjectives to agree with their nouns, and the conjugation of verbs.
Let me know what you have questions about.
Vikki feras bestias resistuit et adjuvat.
(Vikki rescues and helps wild animals.)
Sed est una difficultas. (But there is one difficulty.)
Aliquae bestiae sunt periculosae. (Some animals/beasts are dangerous.)
Cur bestiae sunt periculosae? (Why are the animals dangerous?)
Bestiae sunt periculosae quia sunt territae. (The animals are dangerous because they are frightened.)
Vikki bestias felices amat. (Vikki loves happy animals.)
Generally speaking, subject go at the beginning of a sentence, and verbs go at the end. Also, adjectives generally follow the nouns they are modifying. If you are using a form of the verb "to be" (esse, sum, es, est, sumus, estis, sunt ... ) with a personal pronoun as its subject, you don't need to write the pronoun.