1 Most words are easy: 'the' is an article--3 times; nouns are the words right after 'the' every time.
2 The first noun, 'owners, 'is the subject of the sentence; the second noun, 'doghouse,' is a direct object; the third noun, 'dog,' is the subject of the second clause in the sentence .
3 'orange' is an adjective, but has the special label of 'objective complement,' since it modifies the direct object 'doghouse.'
4 There are 2 verbs: 'painted' and 'slept'. Both are active verbs; the first one is active transitive; the second one is active intransitive.
5 There are 2 adverbs: 'reluctantly' modifies 'slept;' and 'there' tells position
6 'And' is a conjunction, joining the 2 independent clauses