Візьміть повідець і корм перед прийомом.

Візьміть is the imperative form of взяти (to take).

It is used for:

• one person politely: like Take ..., said respectfully
• more than one person: Take ..., said to a group

So Візьміть повідець і корм... means a command or instruction: Take the leash and the food...

Related forms:

• візьми = informal singular (take!)
• візьміть = polite singular or plural (take!)

Because it comes from взяти, it has a perfective sense: take it / pick it up, as a complete action.

Повідець is in the accusative case, but for this noun the accusative looks the same as the nominative.

Here it is the direct object of Візьміть:

• Візьміть що? → повідець
• Візьміть що? → корм

Since повідець is an inanimate masculine noun, its accusative singular usually matches the nominative singular.

So:

• nominative: повідець
• accusative: повідець

That is why the form does not change here.

For the same reason as повідець.

Корм is also:

• masculine
• inanimate
• singular

So in the accusative singular, it usually looks the same as the nominative:

• nominative: корм
• accusative: корм

In this sentence, both direct objects stay in their basic-looking form:

• повідець
• корм

The preposition перед normally requires the instrumental case in Ukrainian.

So:

• прийом = base form
• перед прийомом = before the appointment / before the intake / before the meal, depending on context

This is a very common pattern:

• перед уроком = before the lesson
• перед зустріччю = before the meeting
• перед сном = before sleep

So the ending -ом in прийомом shows the instrumental singular of a masculine noun.

Прийом can mean different things depending on context, so перед прийомом can be a little ambiguous by itself.

Common meanings of прийом include:

• an appointment or consultation, especially with a doctor or veterinarian
• a reception
• in some contexts, intake or taking
• in the phrase прийом їжі, it relates to a meal / food intake

Because the sentence mentions a leash and food, many learners would guess a context involving:

• a vet visit
• a pet appointment
• instructions before some scheduled procedure

So the grammar is clear, but the exact real-world meaning of прийомом depends on the situation.

Yes. І means and.

It joins the two objects:

• повідець
• корм

So the structure is simply:

• Take [the leash] and [the food] before ...

Ukrainian also has й as a variant of і, and speakers may choose і or й partly for smoother pronunciation. But in this sentence, і is completely normal.

Ukrainian does not have articles like English a/an/the.

So nouns often appear without any separate word marking definiteness:

• повідець can mean a leash or the leash
• корм can mean food, some food, or the food

The exact meaning depends on context.

That is very normal in Ukrainian. Learners coming from English often notice this right away, because English requires an article much more often.

Yes, Ukrainian word order is fairly flexible.

Візьміть повідець і корм перед прийомом is a natural, straightforward order.

But depending on emphasis, you could also see:

• Перед прийомом візьміть повідець і корм
  Emphasis on before the appointment
• Корм і повідець візьміть перед прийомом
  Stronger emphasis on the items

Even though word order can change, the original version sounds like a normal instruction.

It can be either:

• plural: talking to more than one person
• formal singular: talking to one person politely

This is exactly like many other Ukrainian verb forms in the imperative:

• Сядьте = Sit down (to one person politely or to several people)
• Зачекайте = Wait (polite singular or plural)

So without context, Візьміть does not tell you which one it is. You need the situation to know.

Yes. That is the informal singular version.

Compare:

• Візьми = take! (to one friend, child, family member, etc.)
• Візьміть = take! (to several people, or politely to one person)

So:

• Візьми повідець і корм перед прийомом = informal
• Візьміть повідець і корм перед прийомом = polite or plural

Grammatically, it is perfectly understandable.

The main thing to be careful about is context, especially with прийомом. A learner might want to ask:

• Before what kind of appointment?
• Does прийом mean a vet visit here?
• Does it mean before feeding / before a meal?

So the sentence is fine, but in real life a native speaker might choose a more specific wording if needed, for example:

• перед прийомом у ветеринара = before the vet appointment
• перед прийомом їжі = before food intake / before a meal

In other words: the grammar is natural, but the exact meaning of прийомом depends heavily on context.